Linux Systems Engineer Sterling, VA, US

CACI International Inc.; Sterling (VA); On-site; USD 104,000 - 218,000; Full time

Benefits offered by this job

Flexible time off

Learning resources

Job summary

CACI International Inc. in Sterling, VA is seeking a Linux Systems Engineer to design, build, and secure Linux-based infrastructures across physical, virtual, and cloud environments.

You will install and maintain Linux servers, monitor performance and security, develop automation scripts in Bash or Python, and deploy containerization with Docker and Kubernetes. The role requires a current TS/SCI clearance with polygraph and a bachelor’s degree with at least seven years of related experience.

Qualifications

• Typically requires bachelor’s degree or equivalent, and at least 7 years of related experience.
• Must have a current TS/SCI security clearance with polygraph
• CCNA (desirable)

Responsibilities

• Install, configure, and maintain Linux operating systems and servers
• Monitor system performance, reliability, and security; respond to alerts proactively
• Troubleshoot system, application, hardware, and network-related issues on Linux platforms
• Develop and maintain automation scripts using Bash, Python, or similar languages to streamline tasks
• Perform regular updates, patching, and system hardening to maintain security posture
• Implement backup, recovery, and disaster‑recovery procedures for Linux environments
• Collaborate with network engineers and other infrastructure teams to ensure high availability
• Maintain documentation related to system configurations, troubleshooting processes, and operational procedures
• Support users and administrators by providing technical guidance
• Manage critical infrastructure services (DNS, DHCP, LDAP, NTP) within Linux environment
• Architect and maintain scalable, highly available Linux infrastructures across physical, virtual, and cloud environments
• Deploy and manage containerization and orchestration solutions such as Docker and Kubernetes
• Conduct vulnerability scanning and security audits; enforce access controls with SELinux

Skills

Linux administration

Bash scripting

Python scripting

Automation

Networking basics

Security hardening

Cloud platforms (AWS/Azure/GCP)

Containerization (Docker, Kubernetes)

Documentation

Security clearance TS/SCI with poly

Education

Bachelor's degree or equivalent

Tools

Ansible

Puppet

Chef

Docker

Kubernetes

Terraform

SELinux

Job description

## Linux Systems EngineerSterling, VA, USApply NowFind out how well you match with this jobJob ID329784Job Title: Linux Systems EngineerJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCI with PolygraphEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local\* \* \*The Opportunity The Linux Systems Engineer will function as part of a team of engineers responsible for designing, building, maintaining, and securing Linux-based systems to ensure reliability, performance, and security across in our secure environments. Responsibilities Install, configure, and maintain Linux operating systems and servers Monitor system performance, reliability, and security; respond to alerts proactively Troubleshoot system, application, hardware, and network-related issues on Linux platforms Develop and maintain automation scripts using Bash, Python, or similar languages to streamline tasks Perform regular updates, patching, and system hardening to maintain security posture Implement backup, recovery, and disaster‐recovery procedures for Linux environments Collaborate with network engineers and other infrastructure teams to ensure seamless integration and high availability of systems Maintain documentation related to system configurations, troubleshooting processes, and operational procedures Support users and administrators by providing technical guidance and resolving Linux-related issues Manage critical infrastructure services (e.g., DNS, DHCP, LDAP, NTP, mail relays) within Linux environment Architect and maintain scalable, highly available Linux infrastructures across physical, virtual, and cloud environments Deploy and manage containerization and orchestration solutions such as Docker and Kubernetes Conduct vulnerability scanning, security audits, and enforce access controls using SELinux or similar tools Perform root‐cause analysis for complex issues involving networking, storage, or application performance Basic Cisco networking management Qualifications Typically requires bachelor’s degree or equivalent, and at least 7 years of related experience. Must have a current TS/SCI security clearance with polygraph CCNA Desired Core Technical Qualifications Strong understanding of Linux operating systems, distributions, file systems, kernel concepts, and system architecture Proficiency in Linux system administration, including installation, configuration, maintenance, performance tuning, and troubleshooting Ability to design, configure, and test Linux servers and operating systems Advanced scripting skills (Bash, Python, Perl) for automation and system efficiency Experience with configuration management tools such as Ansible, Puppet, Chef, or similar platforms Solid knowledge of networking protocols, services, and security hardening (DNS, DHCP, firewalls, routing, etc.) Familiarity with cloud platforms (AWS, Azure, GCP) and hybrid infrastructure environments Ability to monitor and maintain system health, performance, and security events across Linux environments Security & Compliance Qualifications Implementing security measures, patching, vulnerability remediation, and systems hardening. Experience working within compliance frameworks and audit‐ready environments.-**What You Can Expect:****A culture of integrity.**At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.**An environment of trust.**CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.**A focus on continuous growth.**Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.**Pay Range**:There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.The proposed salary range for this position is:$103,800 - $218,100*CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.*